I've got a really grumpy friend who's job it has been to take me to chemo appointments. I remember the first one, I'm in the car sooking, he pulls up outside the hospital and says 'Stop snotting all over me seats. Get out." Right. That set the tone for the next ten years.
Find someone who loves you but is not going to to try to be nice to you, it's sooo refreshing. You can let down your guard and be your terrified self and not worry about them fussing you, asking silly questions or digging up every desperate thing you say weeks or months later.